Enables Spring Security debugging infrastructure. This will provide human-readable (multi-line) debugging information to monitor requests coming into the security filters. This may include sensitive information, such as request parameters or headers, and should only be used in a development environment.

If you use an <http> element within your application, a FilterChainProxy bean named "springSecurityFilterChain" is created and the configuration within the element is used to build a filter chain within FilterChainProxy. As of Spring Security 3.1, additional http elements can be used to add extra filter chains ^[22]. Some core filters are always created in a filter chain and others will be added to the stack depending on the attributes and child elements which are present. The positions of the standard filters are fixed (see the filter order table in the namespace introduction), removing a common source of errors with previous versions of the framework when users had to configure the filter chain explicitly in the FilterChainProxy bean. You can, of course, still do this if you need full control of the configuration.

All filters which require a reference to the AuthenticationManager will be automatically injected with the internal instance created by the namespace configuration (see the introductory chapter for more on the AuthenticationManager).

Each <http> namespace block always creates an SecurityContextPersistenceFilter, an ExceptionTranslationFilter and a FilterSecurityInterceptor. These are fixed and cannot be replaced with alternatives.

This element allows you to set the errorPage property for the default AccessDeniedHandler used by the ExceptionTranslationFilter, using the error-page attribute, or to supply your own implementation using theref attribute. This is discussed in more detail in the section on the ExceptionTranslationFilter.

This element allows for configuring a CorsFilter. If no CorsFilter or CorsConfigurationSource is specified and Spring MVC is on the classpath, a HandlerMappingIntrospector is used as the CorsConfigurationSource.

This element allows for configuring additional (security) headers to be send with the response. It enables easy configuration for several headers and also allows for setting custom headers through the header element. Additional information, can be found in the Security Headers section of the reference.

Adds Cache-Control, Pragma, and Expires headers to ensure that the browser does not cache your secured pages.

When enabled adds the Strict-Transport-Security header to the response for any secure request. This allows the server to instruct browsers to automatically use HTTPS for future requests.

When enabled adds the Public Key Pinning Extension for HTTP header to the response for any secure request. This allows HTTPS websites to resist impersonation by attackers using mis-issued or otherwise fraudulent certificates.

The list of pins

A pin is specified using the base64-encoded SPKI fingerprint as value and the cryptographic hash algorithm as attribute

When enabled adds the Content Security Policy (CSP) header to the response. CSP is a mechanism that web applications can leverage to mitigate content injection vulnerabilities, such as cross-site scripting (XSS).

When enabled adds the X-Frame-Options header to the response, this allows newer browsers to do some security checks and prevent clickjacking attacks.

Adds the X-XSS-Protection header to the response to assist in protecting against reflected / Type-1 Cross-Site Scripting (XSS) attacks. This is in no-way a full protection to XSS attacks!

Add the X-Content-Type-Options header with the value of nosniff to the response. This disables MIME-sniffing for IE8+ and Chrome extensions.

Add additional headers to the response, both the name and value need to be specified.

Adds an AnonymousAuthenticationFilter to the stack and an AnonymousAuthenticationProvider. Required if you are using the IS_AUTHENTICATED_ANONYMOUSLY attribute.

This element will add Cross Site Request Forger (CSRF) protection to the application. It also updates the default RequestCache to only replay "GET" requests upon successful authentication. Additional information can be found in the Cross Site Request Forgery (CSRF) section of the reference.

This element is used to add a filter to the filter chain. It doesn’t create any additional beans but is used to select a bean of type javax.servlet.Filter which is already defined in the application context and add that at a particular position in the filter chain maintained by Spring Security. Full details can be found in the namespace chapter.

Defines the SecurityExpressionHandler instance which will be used if expression-based access-control is enabled. A default implementation (with no ACL support) will be used if not supplied.

Used to add an UsernamePasswordAuthenticationFilter to the filter stack and an LoginUrlAuthenticationEntryPoint to the application context to provide authentication on demand. This will always take precedence over other namespace-created entry points. If no attributes are supplied, a login page will be generated automatically at the URL "/login" ^[23] The behaviour can be customized using the <form-login> Attributes.

Adds a BasicAuthenticationFilter and BasicAuthenticationEntryPoint to the configuration. The latter will only be used as the configuration entry point if form-based login is not enabled.

This is a top-level element which can be used to inject a custom implementation of HttpFirewall into the FilterChainProxy created by the namespace. The default implementation should be suitable for most applications.

This element is used to define the set of URL patterns that the application is interested in and to configure how they should be handled. It is used to construct the FilterInvocationSecurityMetadataSource used by the FilterSecurityInterceptor. It is also responsible for configuring a ChannelProcessingFilter if particular URLs need to be accessed by HTTPS, for example. When matching the specified patterns against an incoming request, the matching is done in the order in which the elements are declared. So the most specific patterns should come first and the most general should come last.

<intercept-url> Attributes

• access Lists the access attributes which will be stored in the FilterInvocationSecurityMetadataSource for the defined URL pattern/method combination. This should be a comma-separated list of the security configuration attributes (such as role names).

• filters Can only take the value "none". This will cause any matching request to bypass the Spring Security filter chain entirely. None of the rest of the <http> configuration will have any effect on the request and there will be no security context available for its duration. Access to secured methods during the request will fail.

	Note
	This property is invalid for filter-security-metadata-source

• method The HTTP Method which will be used in combination with the pattern and servlet path (optional) to match an incoming request. If omitted, any method will match. If an identical pattern is specified with and without a method, the method-specific match will take precedence.

• pattern The pattern which defines the URL path. The content will depend on the request-matcher attribute from the containing http element, so will default to ant path syntax.

• requires-channel Can be "http" or "https" depending on whether a particular URL pattern should be accessed over HTTP or HTTPS respectively. Alternatively the value "any" can be used when there is no preference. If this attribute is present on any <intercept-url> element, then a ChannelProcessingFilter will be added to the filter stack and its additional dependencies added to the application context.

If a <port-mappings> configuration is added, this will be used to by the SecureChannelProcessor and InsecureChannelProcessor beans to determine the ports used for redirecting to HTTP/HTTPS.

	Note
	This property is invalid for filter-security-metadata-source

• servlet-path The servlet path which will be used in combination with the pattern and HTTP method to match an incoming request. This attribute is only applicable when request-matcher is 'mvc'. In addition, the value is only required in the following 2 use cases: 1) There are 2 or more HttpServlet 's registered in the ServletContext that have mappings starting with '/' and are different; 2) The pattern starts with the same value of a registered HttpServlet path, excluding the default (root) HttpServlet '/'.

	Note
	This property is invalid for filter-security-metadata-source

Adds a J2eePreAuthenticatedProcessingFilter to the filter chain to provide integration with container authentication.

Adds a LogoutFilter to the filter stack. This is configured with a SecurityContextLogoutHandler.

Similar to <form-login> and has the same attributes. The default value for login-processing-url is "/login/openid". An OpenIDAuthenticationFilter and OpenIDAuthenticationProvider will be registered. The latter requires a reference to a UserDetailsService. Again, this can be specified by id, using the user-service-ref attribute, or will be located automatically in the application context.

The attribute-exchange element defines the list of attributes which should be requested from the identity provider. An example can be found in the OpenID Support section of the namespace configuration chapter. More than one can be used, in which case each must have an identifier-match attribute, containing a regular expression which is matched against the supplied OpenID identifier. This allows different attribute lists to be fetched from different providers (Google, Yahoo etc).

Attributes used when making an OpenID AX Fetch Request

By default, an instance of PortMapperImpl will be added to the configuration for use in redirecting to secure and insecure URLs. This element can optionally be used to override the default mappings which that class defines. Each child <port-mapping> element defines a pair of HTTP:HTTPS ports. The default mappings are 80:443 and 8080:8443. An example of overriding these can be found in the namespace introduction.

Provides a method to map http ports to https ports when forcing a redirect.

Adds the RememberMeAuthenticationFilter to the stack. This in turn will be configured with either a TokenBasedRememberMeServices, a PersistentTokenBasedRememberMeServices or a user-specified bean implementing RememberMeServices depending on the attribute settings.

Sets the RequestCache instance which will be used by the ExceptionTranslationFilter to store request information before invoking an AuthenticationEntryPoint.

Session-management related functionality is implemented by the addition of a SessionManagementFilter to the filter stack.

Adds support for concurrent session control, allowing limits to be placed on the number of active sessions a user can have. A ConcurrentSessionFilter will be created, and a ConcurrentSessionControlAuthenticationStrategy will be used with the SessionManagementFilter. If a form-login element has been declared, the strategy object will also be injected into the created authentication filter. An instance of SessionRegistry (a SessionRegistryImpl instance unless the user wishes to use a custom bean) will be created for use by the strategy.

Adds support for X.509 authentication. An X509AuthenticationFilter will be added to the stack and an Http403ForbiddenEntryPoint bean will be created. The latter will only be used if no other authentication mechanisms are in use (its only functionality is to return an HTTP 403 error code). A PreAuthenticatedAuthenticationProvider will also be created which delegates the loading of user authorities to a UserDetailsService.

Used to explicitly configure a FilterChainProxy instance with a FilterChainMap

Used within to define a specific URL pattern and the list of filters which apply to the URLs matching that pattern. When multiple filter-chain elements are assembled in a list in order to configure a FilterChainProxy, the most specific patterns must be placed at the top of the list, with most general ones at the bottom.

Used to explicitly configure a FilterSecurityMetadataSource bean for use with a FilterSecurityInterceptor. Usually only needed if you are configuring a FilterChainProxy explicitly, rather than using the<http> element. The intercept-url elements used should only contain pattern, method and access attributes. Any others will result in a configuration error.

The websocket-message-broker element has two different modes. If the websocket-message-broker@id is not specified, then it will do the following things:

If additional control is necessary, the id can be specified and a ChannelSecurityInterceptor will be assigned to the specified id. All the wiring with Spring’s messaging infrastructure can then be done manually. This is more cumbersome, but provides greater control over the configuration.

Defines an authorization rule for a message.

Every Spring Security application which uses the namespace must have include this element somewhere. It is responsible for registering the AuthenticationManager which provides authentication services to the application. All elements which create AuthenticationProvider instances should be children of this element.

Unless used with a ref attribute, this element is shorthand for configuring a DaoAuthenticationProvider. DaoAuthenticationProvider loads user information from a UserDetailsService and compares the username/password combination with the values supplied at login. The UserDetailsService instance can be defined either by using an available namespace element ( jdbc-user-service or by using the user-service-ref attribute to point to a bean defined elsewhere in the application context). You can find examples of these variations in the namespace introduction.

<security:authentication-manager>
<security:authentication-provider ref="myAuthenticationProvider" />
</security:authentication-manager>
<bean id="myAuthenticationProvider" class="com.something.MyAuthenticationProvider"/>

Causes creation of a JDBC-based UserDetailsService.

select username, authority from authorities where username = ?

Authentication providers can optionally be configured to use a password encoder as described in the namespace introduction. This will result in the bean being injected with the appropriate PasswordEncoder instance, potentially with an accompanying SaltSource bean to provide salt values for hashing.

Password salting strategy. A system-wide constant or a property from the UserDetails object can be used.

Creates an in-memory UserDetailsService from a properties file or a list of "user" child elements. Usernames are converted to lower-case internally to allow for case-insensitive lookups, so this should not be used if case-sensitivity is required.

Represents a user in the application.

This element is the primary means of adding support for securing methods on Spring Security beans. Methods can be secured by the use of annotations (defined at the interface or class level) or by defining a set of pointcuts as child elements, using AspectJ syntax.

This element can be used to decorate an AfterInvocationProvider for use by the security interceptor maintained by the <global-method-security> namespace. You can define zero or more of these within the global-method-security element, each with a ref attribute pointing to an AfterInvocationProvider bean instance within your application context.

Allows the default expression-based mechanism for handling Spring Security’s pre and post invocation annotations (@PreFilter, @PreAuthorize, @PostFilter, @PostAuthorize) to be replace entirely. Only applies if these annotations are enabled.

Defines the PrePostInvocationAttributeFactory instance which is used to generate pre and post invocation metadata from the annotated methods.

Customizes the PostInvocationAdviceProvider with the ref as the PostInvocationAuthorizationAdvice for the <pre-post-annotation-handling> element.

Customizes the PreInvocationAuthorizationAdviceVoter with the ref as the PreInvocationAuthorizationAdviceVoter for the <pre-post-annotation-handling> element.

<protect-pointcut> Rather than defining security attributes on an individual method or class basis using the @Secured annotation, you can define cross-cutting security constraints across whole sets of methods and interfaces in your service layer using the <protect-pointcut> element. You can find an example in the namespace introduction.

Can be used inside a bean definition to add a security interceptor to the bean and set up access configuration attributes for the bean’s methods

Creates a MethodSecurityMetadataSource instance

Defines a protected method and the access control configuration attributes that apply to it. We strongly advise you NOT to mix "protect" declarations with any services provided "global-method-security".

<ldap-server> Element This element sets up a Spring LDAP ContextSource for use by the other LDAP beans, defining the location of the LDAP server and other information (such as a username and password, if it doesn’t allow anonymous access) for connecting to it. It can also be used to create an embedded server for testing. Details of the syntax for both options are covered in the LDAP chapter. The actual ContextSource implementation is DefaultSpringSecurityContextSource which extends Spring LDAP’s LdapContextSource class. The manager-dn and manager-password attributes map to the latter’s userDn and password properties respectively.

If you only have one server defined in your application context, the other LDAP namespace-defined beans will use it automatically. Otherwise, you can give the element an "id" attribute and refer to it from other namespace beans using the server-ref attribute. This is actually the bean id of the ContextSource instance, if you want to use it in other traditional Spring beans.

This element is shorthand for the creation of an LdapAuthenticationProvider instance. By default this will be configured with a BindAuthenticator instance and a DefaultAuthoritiesPopulator. As with all namespace authentication providers, it must be included as a child of the authentication-provider element.

This is used as child element to <ldap-provider> and switches the authentication strategy from BindAuthenticator to PasswordComparisonAuthenticator.

This element configures an LDAP UserDetailsService. The class used is LdapUserDetailsService which is a combination of a FilterBasedLdapUserSearch and a DefaultLdapAuthoritiesPopulator. The attributes it supports have the same usage as in <ldap-provider>.